testing-and-qa

- Mobile (320px, 375px, 414px widths) - Tablet (768px, 1024px widths) - Desktop (1280px, 1920px widths) - Both light and dark modes - Different font sizes (browser zoom 100%, 125%, 150%) - Slow 3G network simulation

Testing and Quality Assurance

Visual Testing Checklist

• [ ] Mobile (320px, 375px, 414px widths)
• [ ] Tablet (768px, 1024px widths)
• [ ] Desktop (1280px, 1920px widths)
• [ ] Both light and dark modes
• [ ] Different font sizes (browser zoom 100%, 125%, 150%)
• [ ] Slow 3G network simulation

Functional Testing

• [ ] All links work
• [ ] Forms validate correctly
• [ ] Error states display properly
• [ ] Loading states appear appropriately
• [ ] Empty states handled
• [ ] Navigation works on all devices

Accessibility Testing

Automated:

• [ ] Run Lighthouse accessibility audit (score > 95)
• [ ] Run axe DevTools scan (0 violations)
• [ ] Check WAVE report

Manual:

• [ ] Test with keyboard only (no mouse)
• [ ] Test with screen reader (NVDA, VoiceOver)
• [ ] Verify color contrast (WebAIM)
• [ ] Ensure focus indicators are visible
• [ ] Test form error announcements
• [ ] Verify heading hierarchy

Performance Testing

• [ ] Lighthouse performance score > 90
• [ ] Check bundle size (< 200KB initial)
• [ ] Measure load time on slow 3G
• [ ] Verify images are optimized
• [ ] Check for layout shift (CLS < 0.1)
• [ ] Test with throttled CPU

Cross-browser Testing

• [ ] Chrome/Edge (Chromium)
• [ ] Firefox
• [ ] Safari (macOS/iOS)

Tools

Accessibility:

• Lighthouse (Chrome DevTools)
• axe DevTools extension
• WAVE browser extension
• NVDA screen reader (Windows)
• VoiceOver (macOS/iOS)

Performance:

• Lighthouse
• WebPageTest
• Chrome DevTools Performance panel

Visual:

• Responsively (responsive testing)
• BrowserStack (cross-browser)